Filter-press ring.



G. ELY.

FILTER PRESS RING.

APPLI'OATION FILED JUNE 28, 1911.

Patented July 9, 1912.

5] WE who a Meses- M ilNllTEfi fiTATFE PATENT @FFICE.

GEORGE ELY, 0F PITlfiBURGH, PENNSYLVANIA, ASSIGNOR TO OARBONDALE MACHINECOMPANY, OF CARBONDALE, PENNSYLVANIA, A. COHPORATIQN OF PENNSYLVANIA.

FILTER-PRESS RING.

Application filed June 28,

Specification of Letters Patent.

1911. Serial No. 635,802.

To all 207mmz't may concern.

Be it known that I, Gnonon ELY, a citizen of the United States ofAmerica, and a resident of Pittsburgh, county of Allegheny, and State ofPennsylvania, have invented certain new and useful Improvements in Filter-Press Rings, of which the following is a specification.

My invention relates to improvements in filter press rings, andcomprises an improved construction for connecting to such rings the lugsby which such rings are supported on the side rods of the filter press.

The object of my invention is to connect such rings and lugs in animproved and simple manner.

I will now proceed to describe my invention with reference to theaccompanying drawings, in which two constructions embodying my inventionare illustrated, and will then point out the novel features in claims.

In said drawings: Figure 1 shows a front elevation of a filter pressring provided with lugs connected to the ring according to one of theconstructions embodying my invention, and Fig. 2 is a fragmentaryelevation, on a larger scale, illustrating the same construction. Fig. 3is a detail view of the lug shown in Fig. 2, looking toward the base ofthe lug. Fig. 4 is a fragmentary side elevation illustrating analternative and preferred construction, and Fig. 5 is a detail view ofthe lug shown in Fig. 4, looking toward the base of the lug.

Referring first to Figs. 1, 2 and 3, 1 designates the filter press ring,and 2, Q, desig nate lugs secured to said ring, and designed to supportthe same on the side rods l (indicated in dotted lines in Fig. 1) of afilter press. These lugs are required to support considerable weight,and it is important that they shall be so secured to the ring 1 thatthey shall not work loose, or sag, and that the pressure of these lugsshall be distributed over a considerable portion of the periphery of thering. To this end, the lugs are made broad at the base, in the plane ofI the ring; and since mere bolts or rivets are unsatisfactory means forsustaining the load to be transferred from the ring to the lugs, eachlug is provided with a key or projection, 5, preferably of dovetailform, as shown especially in Fig. 2, fitting into a cor- I respondinggroove in the periphery of the ring. Such key, by fitting closely intothe corresponding groove of the ring, serves to locate the lugaccurately with respect to the ring, and furthermore to transfer to thelug the load on the ring; and the fastening means, if any, other thanthe said dovetail key and groove, may be simple rivets 6 which arereadily applied by unskilled labor. Such rivets, when employed, aremerely under tension; the shearing stress, due to the load on the ring,being carried by the projection In the alternative construction, shownin Figs. at and 5, the use of such rivets is avoided altogether, byproviding the lug with a plurality of projections, here designated bynumerals 7, fitting into corresponding grooves of the ring 1. As thetensional stress to be withstood by these pro jections is greatest nearthe lower end of the base of the lug, two of these projections l or keysare provided near such lower end of the lug base, another similarprojection being provided near the top of the base of the lug. In theconstruction shown in Figs.

4 and 5, these projections or keys 7 are of bulbous profile, the groovesin the ring, into which they fit, being of corresponding forinpreferablycircular in section. Such grooves may be formed very readily by means ofa drill. Since the stress is much greater near the lower end of the lugthan near the upper end thereof, two projections or keys 7 are providednear such lower end.

In both constructions shown, the lugs are put in place on the ring 1 bya lateral movement. The construct-ion shown in Figs. 4 and 5 obviatesany occasion for use of fastenings other than the keys 7 themselves.

What I claim is 1. A filter press ring comprising in combination a rigidring, and a supporting lug secured thereto the base of which extends, inthe plane of the ring, through a considerable distance, said ring andlug being provided the one with a rigidly attached key and the otherwith a correspondingly formed recess, into which said key fits.

2. A filter press ring comprising in combination a ring and a lug thebase of which eX tends, in the plane of the ring, through a considerabledistance, said ring and lug secured together by a plurality of keysformed on one of said members and fitting into correspondingly-formedrecesses in the other of said members, a plurality of sald keys locatednear the lower end of the base of the lug.

3. A filter press ring comprising in combination a ring and :1 lug, oneof said members provided With pro]ecting keys of approximately circularsection fitting into open slots of approximately circular section in theother of said members.

In testimony whereof I have signed this specification in the presence oftwo subscribing Witnesses. GEORGE ELY.

Witnesses WALTER W. KING, Gno. F. ROBINSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, .D. C.

